March 4, 2010: Ambassador Jeffrey Davidow, President, Institute of the Americas in San Diego, California and Former United States Ambassador to Mexico, "Mexico and Other Challenges in Latin America for U.S. Policy"

January 28, 2010: Ambassador Andrés Rozental, Former Deputy Minister of Mexico and Senior Fellow, The Brookings Institution, "Mexico-U.S. Relations: A New Chapter or More of the Same?"

February 12, 2009: Willarda V. Edwards, M.D., M.B.A., President and C.O.O., Sickle Cell Disease Association of America and President-Elect of the National Medical Association, "The Road to Health Equity"

January 29, 2009: Wilson Compton, M.D., M.P.E., Director, Division of Epidemiology, Services and Prevention Research, National Institute on Drug Abuse, "The Challenges and Implications of Understanding Addiction as a Brain Disease"

December 8, 2008: Eduardo Sanchez, M.D., Vice President and Chief Medical Officer, Blue Cross Blue Shield of Texas, "The Health of America in an Obama Administration"

October 1, 2008: Dr. James Duderstadt, President Emeritus, University Professor of Science and Engineering, University of Michigan, "Higher Education in the 21st Century: Themes, Challenges, and Opportunities"

April 2, 2008: James Steinberg, J.D., Dean, Lyndon B. Johnson School of Public Affairs, The University of Texas at Austin, "U.S. National Security and Foreign Policy in 2009-Grand Challenges Facing the Next President"

March 18, 2008: Ambassador Larry L. Palmer, President, Inter-American Foundation and former United States Ambassador to Honduras, "Sustainable Development Through Responsive Assistance: Answering the Security Challenges of the New Millennium"

February 26, 2008: Dr. Susan Hackwood, Executive Director, California Council on Science and Technology, "The Impact of Global Economic Change on Security"

November 14, 2007: William Dee, President and C.E.O., Malcolm Pirnie, Inc., "Defining Security in the 21st Century: The Relationship of our Nation's Water Resources and Security"

September 13, 2007: General Gordon Sullivan, President and Chief Operating Officer, Association of the United States Army, "National Security and the Threat of Climate Change"

April 9, 2007: Dr. Charles Kennel, Director, Environment and Sustainability Initiative, University of California, San Diego; Former Director, Scripps Institution of Oceanography, "Had We World Enough and Time: Global Earth Science and Sustainability"

March 20, 2007: A Special Presentation of "An Inconvenient Truth", Documentary Film

February 27, 2007: David Satcher, M.D., Ph.D. Director, Center of Excellence on Health Disparities and Pouissant-Satcher-Cosby Chair in Mental Health, Morehouse School of Medicine, and former Surgeon General of the United States

December 7, 2006: Dr. Kelvin Droegemeier, Regents’ Professor of Meteorology and Weathernews Chair, Center for Analysis and Prediction of Storms, University of Oklahoma, "Weather and Climate Prediction: How Clear is the Crystal Ball?"

October 26, 2006: A Special Presentation of Discovery Channel’s "Global Warming: What You Need to Know," with Tom Brokaw

March 1, 2006: The Honorable Dana Gioia, Chairman of the National Endowment for the Arts

April 26, 2005: Susanna Nettleton Sutro, Honorary Secretary of the Royal Society for Asian Affairs

March 8, 2005: Dr. Peter Stansky, Frances and Charles Field Professor of History, Stanford University

November 12, 2004: Dr. Michael Hawley, Director of Special Projects, School of Architecture and Planning, Massachusetts Institute of Technology, "Bhutan: A Visual Odyssey Across the Last Himalayan Kingdom"

October 20, 2004: F. A. (Tex) Harris, Secretary of the American Foreign Service Association, "Beyond Iraq: Meeting the Millennium's Challenges to America's Security and Prosperity"

November 11, 2003: Robert O’Rear, Former Director of International Operations, Microsoft Corporation, "From the Texas Panhandle to the Formation of the World's Largest Software Enterprise"

May 1, 2002: Ambassador Frank V. Ortiz, Retired Foreign Service Officer and Former United States Ambassador to Barbados, Grenada, Guatemala, Peru and Argentina

February 20, 2002: Dr. Walter Persegati, Former Secretary General and Treasurer of the Vatican Monuments, Museums and Art Galleries, "Michelangelo Rediscovered: The Cleaning of Michelangelo's Frescoes in the Sistine Chapel"

December 6, 2001: Ambassador Lyonpo Om Pradhan, Permanent Representative of the Kingdom of Bhutan to the United Nations, "Bhutan's Development Philosophy: Gross National Happiness"

October 26, 2001: Robert Decherd, Chairman of the Board, President and C.E.O. of Belo Corp., "Journalism, Society and the Free Market"

April 25, 2001: Dr. D. James Baker, Former Administrator, National Oceanic and Atmospheric Administration, "Sustainable Development: A 2000-Year Overview"